diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/readdir64.c')
| -rw-r--r-- | sysdeps/unix/sysv/linux/readdir64.c | 131 |
1 files changed, 121 insertions, 10 deletions
diff --git a/sysdeps/unix/sysv/linux/readdir64.c b/sysdeps/unix/sysv/linux/readdir64.c index 170a889c51..1aa6e2664f 100644 --- a/sysdeps/unix/sysv/linux/readdir64.c +++ b/sysdeps/unix/sysv/linux/readdir64.c @@ -23,17 +23,71 @@ #define readdir __no_readdir_decl #define __readdir __no___readdir_decl #include <dirent.h> +#undef __readdir +#undef readdir -#define __READDIR __readdir64 -#define __GETDENTS __getdents64 -#define DIRENT_TYPE struct dirent64 +/* Read a directory entry from DIRP. */ +struct dirent64 * +__readdir64 (DIR *dirp) +{ + struct dirent64 *dp; + int saved_errno = errno; -#include <sysdeps/posix/readdir.c> +#if IS_IN (libc) + __libc_lock_lock (dirp->lock); +#endif -#undef __readdir -#undef readdir + do + { + size_t reclen; + + if (dirp->offset >= dirp->size) + { + /* We've emptied out our buffer. Refill it. */ + + size_t maxread = dirp->allocation; + ssize_t bytes; + + bytes = __getdents64 (dirp->fd, dirp->data, maxread); + if (bytes <= 0) + { + /* On some systems getdents fails with ENOENT when the + open directory has been rmdir'd already. POSIX.1 + requires that we treat this condition like normal EOF. */ + if (bytes < 0 && errno == ENOENT) + bytes = 0; + + /* Don't modifiy errno when reaching EOF. */ + if (bytes == 0) + __set_errno (saved_errno); + dp = NULL; + break; + } + dirp->size = (size_t) bytes; + /* Reset the offset into the buffer. */ + dirp->offset = 0; + } + + dp = (struct dirent64 *) &dirp->data[dirp->offset]; + + reclen = dp->d_reclen; + + dirp->offset += reclen; + + dirp->filepos = dp->d_off; + + /* Skip deleted files. */ + } while (dp->d_ino == 0); + +#if IS_IN (libc) + __libc_lock_unlock (dirp->lock); +#endif + + return dp; +} libc_hidden_def (__readdir64) + #if _DIRENT_MATCHES_DIRENT64 strong_alias (__readdir64, __readdir) weak_alias (__readdir64, readdir64) @@ -49,10 +103,67 @@ versioned_symbol (libc, __readdir64, readdir64, GLIBC_2_2); # endif # if SHLIB_COMPAT(libc, GLIBC_2_1, GLIBC_2_2) # include <olddirent.h> -# define __READDIR attribute_compat_text_section __old_readdir64 -# define __GETDENTS __old_getdents64 -# define DIRENT_TYPE struct __old_dirent64 -# include <sysdeps/posix/readdir.c> + +attribute_compat_text_section +struct __old_dirent64 * +__old_readdir64 (DIR *dirp) +{ + struct __old_dirent64 *dp; + int saved_errno = errno; + +#if IS_IN (libc) + __libc_lock_lock (dirp->lock); +#endif + + do + { + size_t reclen; + + if (dirp->offset >= dirp->size) + { + /* We've emptied out our buffer. Refill it. */ + + size_t maxread = dirp->allocation; + ssize_t bytes; + + bytes = __old_getdents64 (dirp->fd, dirp->data, maxread); + if (bytes <= 0) + { + /* On some systems getdents fails with ENOENT when the + open directory has been rmdir'd already. POSIX.1 + requires that we treat this condition like normal EOF. */ + if (bytes < 0 && errno == ENOENT) + bytes = 0; + + /* Don't modifiy errno when reaching EOF. */ + if (bytes == 0) + __set_errno (saved_errno); + dp = NULL; + break; + } + dirp->size = (size_t) bytes; + + /* Reset the offset into the buffer. */ + dirp->offset = 0; + } + + dp = (struct __old_dirent64 *) &dirp->data[dirp->offset]; + + reclen = dp->d_reclen; + + dirp->offset += reclen; + + dirp->filepos = dp->d_off; + + /* Skip deleted files. */ + } while (dp->d_ino == 0); + +#if IS_IN (libc) + __libc_lock_unlock (dirp->lock); +#endif + + return dp; +} libc_hidden_def (__old_readdir64) compat_symbol (libc, __old_readdir64, readdir64, GLIBC_2_1); # endif /* SHLIB_COMPAT(libc, GLIBC_2_1, GLIBC_2_2) */ |